{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "In an attempt to start investigating how exposure to effluent - contaminated water may directly affect humans and other terrestrial vertebrates , rats were tube - fed effluent ."}
{"Chemical": []}